I've edited your post with your account number for security purposes.
Just ran a remote line test and this shows no physical issue on the line.
But I do still recommend that we have one of our technicians give you a call to resolve your issue as your service may be affected by other factors.
Please let us know your best time and contact number via PM so I can get a technician to call you.
For your reference, please see How do I private message (PM) in the community.
Thank you for sending your details via PM.
I've now arranged a call from one of our technicians tomorrow, 8 March between 10am - 11am NSW.
We would appreciate if you'll be at home during the time of call as our technicians would like carry out simple checks with you to eliminate any possible equipment issue. If this time is not suitable, please let us know and we'll have this rearrange for you.
Please also leave the modem switched on all the time for monitoring purposes.